In the article, I left out
Morus rubra (Red Mulberry) which is native to eastern Canada and the U.S., roughly from Ontario down through eastern Texas and over to the Atlantic Ocean. The fruit
is red. Historically in the U.S. it was an important food source for both birds and people. Here in southern California it is less popular than Morus alba -- mainly because it grows to an enormous size in our more temperate climate.